// https://github.com/dawaltconley/sass-cast/blob/main/utils.js

import * as sass from 'sass-embedded'

/**
 * Check if string is quoted
 * @private
 * @param {string} str
 * @return {boolean}
 */
export const isQuoted = (str) => /^['"].*['"]$/.test(str)

/**
 * Surrounds a string with quotes
 * @private
 * @param {string} str
 * @param {string} q - quotes, double or single
 * @return {string}
 */
export const quoteString = (str, q) => {
    if (!q) return str
    if (isQuoted(str)) {
        q = str[0]
        str = str.slice(1, -1)
    }
    let r = new RegExp(q, 'g')
    return q + str.replace(r, '\\' + q) + q
}

/**
 * Unquotes a string
 * @private
 * @param {string} str
 * @return {string}
 */
export const unquoteString = (str) => (isQuoted(str) ? str.slice(1, -1) : str)

/**
 * Parse a string as a Sass object
 * cribbed from davidkpiano/sassport
 *
 * @private
 * @param {string} str
 * @return {Value}
 */
export const parseString = (str) => {
    let result

    try {
        sass.compileString(`$_: ___(${str});`, {
            functions: {
                '___($value)': (args) => {
                    result = args[0]
                    return result
                },
            },
        })
    } catch (e) {
        return str
    }

    return result
}

/**
 * Parse a string as a legacy Sass object
 * cribbed from davidkpiano/sassport
 *
 * @private
 * @param {string} str
 * @return {LegacyObject}
 */
export const parseStringLegacy = (str) => {
    let result

    try {
        sass.renderSync({
            data: `$_: ___((${str}));`,
            functions: {
                '___($value)': (value) => {
                    result = value
                    return value
                },
            },
        })
    } catch (e) {
        return str
    }

    return result
}

/**
 * Function to handle 'toString()' methods with legacy API.
 *
 * @private
 * @param {LegacyObject} obj
 * @return {string}
 */
export const legacyToString = (obj) => (obj.dartValue || obj).toString()

/**
 * Return a value from an object and a list of keys.
 * @private
 * @param {Object|Array} obj
 * @param {*[]} attrs
 */
export const getAttr = (obj, attrs) => attrs.reduce((o, attr) => o[attr], obj)